In fact i've read on some forum focused on prehistoric events (Neandertalis and sapiens "cohabitation") that the theory of humans having wolf/lion pack type of behavior (Alpha male with multiple females, beta couples leaving the pack during hard time, stuff like this).
It's a trait of a natural darwinian systems imho. Look at how it works in nature - a pride of lions would have 1 alpha male who dominates most, if not all females.
I have no reason to believe that humans don't have the same innate behaviour as lions.